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Berrange" , Peter Maydell , "Michael S . Tsirkin" , Mauro Matteo Cascella , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [RFC PATCH-for-5.2 2/2] net: Assert no packet bigger than NET_BUFSIZE is queued Date: Fri, 27 Nov 2020 16:45:24 +0100 Message-Id: <20201127154524.1902024-3-philmd@redhat.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201127154524.1902024-1-philmd@redhat.com> References: <20201127154524.1902024-1-philmd@redhat.com> MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=philmd@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @redhat.com) Ensure no packet bigger then NET_BUFSIZE is queued via qemu_net_queue_append*() by adding assertions. Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- net/queue.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/queue.c b/net/queue.c index 221a1c87961..94b98b19ef9 100644 --- a/net/queue.c +++ b/net/queue.c @@ -102,6 +102,8 @@ static void qemu_net_queue_append(NetQueue *queue, if (queue->nq_count >=3D queue->nq_maxlen && !sent_cb) { return; /* drop if queue full and no callback */ } + + assert(size <=3D NET_BUFSIZE); packet =3D g_malloc(sizeof(NetPacket) + size); packet->sender =3D sender; packet->flags =3D flags; @@ -131,6 +133,7 @@ void qemu_net_queue_append_iov(NetQueue *queue, max_len +=3D iov[i].iov_len; } =20 + assert(max_len <=3D NET_BUFSIZE); packet =3D g_malloc(sizeof(NetPacket) + max_len); packet->sender =3D sender; packet->sent_cb =3D sent_cb; --=20 2.26.2